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Studies

Jopp & Rott (2006): study DE Heidelberg 2001

Publication

Author(s):
Jopp, D.; Rott, C.
Title:
Adaptation in Very Old Age: Exploring the Role of Resources, Beliefs and Attitudes for Centenarians' Happiness.
Source:
Psychology and Aging, 2006, Vol. 21, 266 - 280

Investigation

Public:
99+ aged, Heidelberg, Germany , 2001
Survey name:
DE-Heidelberg Centenarian Study
Sample:
Non-probability purposive sample
Respondents:
N = 249
Non Response:
63%
Assessment:
Interview: face-to-face

Happiness Measure(s) and Distributional Findings

Full text:
Selfreport on single question:

… feel happy most of the time.. (full text not reported)
1  yes
0  no
Classification:
M-TH-?-sq-v-2-a
Author's label:
Happiness
Remarks:
All respondents that were not able to answer self-report questions because of severe cognitive decline were excluded from the sample.

The publication reports an analysis using a ' happiness factor' consisting of 2 more  measures which do not fit the criteria for inclusion in the WDH. Hence the results obtained with that measure are not included here.
Page in publication:
270-272
Observed distribution
Frequencies
1: 28.6%,   2: 71.4%   (total 100%)
Summary Statistics
On original range 0 - 1 On range 0-10
Mean:
0.71
SD:
0.46